基于MODIS卫星监测东海缺氧的定性研究

Qualitative Study on Monitoring East China Sea Hypoxia Based on MODIS Images

在研究东海缺氧发生因素的基础上，通过富营养化以及水体分层的代表参数来逼近缺氧的发生机理。使用海表温度、海表浊度来表征长江冲淡水范围，叶绿素α浓度和海表净初级生产力来指示富营养化情况。通过2003年9月的实际航测资料，进行东海缺氧情况监测的探索研究。研究发现，使用叶绿素α〉5．5mg／m^3，海表温度介于25～27℃，以及海表净初级生产力〉4500mgC／m^2／day，海表浊度〉1nm，更为接近真实的缺氧发生范围，具备缺氧监测的条件。

On the basis of hypoxia occurrence factor study, the occurrence mechanism was approached via the representative parameters about eutrophication and water stratification, using sea surface temperature, turbidity on behave of Yangtze plume and chlorophyll-α, sea surface net primary productivity of eutrophication. The monitoring hypoxia in East China Sea was studied from the aerial survey in September, 2003. The results show that it is more closer to hypoxia occurrence position when choosing chlorophyll-or 〉 5.5 mg/m^3, sea surface temperature from 25 α to 27 α and sea surface net primary productivity 〉 4 500 mg C/m^2/day, sea surface turbidity 〉1 ntu, which has the conditions of monitoring.